package cn.usian.filter;

import org.apache.http.HttpStatus;
import org.springframework.cloud.gateway.filter.GatewayFilterChain;
import org.springframework.core.annotation.Order;
import org.springframework.stereotype.Component;
import org.springframework.util.MultiValueMap;
import org.springframework.web.client.UnknownHttpStatusCodeException;
import org.springframework.web.server.ServerWebExchange;
import reactor.core.publisher.Mono;

@Order(-1)
@Component
public class AuthorizeFilter implements GlobalFilter{
    @Override
    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
       //1.获取请求参数
        MultiValueMap<String, String> params = exchange.getRequest().getQueryParams();
        //2.获取authorization参数
        String auth = params.getFirst("authorization");
        //3.校验
        if ("admin".equals(auth)){
            //放行
            return chain.filter(exchange);

        }
        //4.拦截，禁止访问，设置状态码
        exchange.getResponse().setRawStatusCode(HttpStatus.SC_FORBIDDEN);
        //5.结束处理
        return exchange.getResponse().setComplete();
    }
}
